Motor blower unit for metabolism apparatus or the like



March 16 1926. 1,577,110

w. E. COLLINS MOTOR BLOWER UNIT FOR'METABOLISM APPARATUS OR THE LIKE Filed Feb. 7, 1925 2 Sheets-Sheet 1 L Jinnah} /iI Zrmnltolluu March 16 1926. 1,577,110

w. E. COLLINS MOTOR BLOWER UNIT F'OR METABOL ISM APPARATUS OR THE LIKE Filed Feb. 7, 1925 '2 Sheets-Sheet 2 1r R bar/20hr mmlzzwllaa I 47v t I Patented Mar. 16, 1.926. t? 3;, Ellie UNIT-ED sr'rssrfarsr tries.

WARREN E. COLLINS, F JAMAICA. PLAIN, MASSACHUSETTS.

v'MO'JIOIB. BLOWER U NIT FOB. IVIE'LkBOLISllI A I-RUMLJTEJS OR THE LIKE.

llpplication filed February 7, 1925. Serial No. 7,1399.

1 i i Z 0 all-1071077246 may concern. speclficatlon and drawings like reference Be 1t known that I, WARREN E. COLLINS, a characters are employed to indicate correcltizen of the United States, residing at spending parts, and in the drawings: Jamaica Plain, county of Suffolk, Common- F 1g. 1 is aplan view of an apparatus in wealth of Massachusetts, have lnvented ceraccordance with my invention. 55

taln new and useful Improvements in Motor Fig. 2 isaside yiew thereof, partly broken Blower Units for 'Metabohsm Apparatusor away to disclose internal structure.

the like, of which the following is a speci- I Figs. 3 and 4 are end views'of the motor ficat-lon. 1 4 and=blower ends respectively. This invention relates toblowers and par 7 Fig. '5 is a somewhat:diagrammatic view 60 ticularly to such devices used for the circu-' of an; installation with my motor. 7 lation of oxygen or other gases where de- Fig. .6 is an enlarged section of my fan sired degree of pressure is of great imporbearing and packing, and

tance and where the purity of the gas han- Fig. 7 is a view of an impeller blade and dled is a prime requisite. As illustrative shaft removed. V 65 of such usage and as'indicative of the ex- In these drawings I have indicated at 1 a haustive character of the requirements Iwill blower casing of shallow cylindrical form discuss my invention in connection with aphaving an exhaust 2 adapted to be connected para-tus used in metabolistic experiments and to any desired apparatus. One of the lattests. Such use is, offcourse,to be consideral walls 1 is apertured as at 3 for intake 70 ered merely as illustrative as my blower has being provided with an annular flange 3 been developed in connection with my mesurrounding said opening in which is lotabolism apparatus. V 1 cated a compressible washer at against which 1 As is well known such tests as those inthe end of one arm of an elbow 5 finds bearvolving the use of oxygen in connection with ing. The oppositeend of the elbow 5 is conrespiration necessitate apparatus of themo'st nected with a suitable nipple 5 whichmay delicate character whether the testbe merely be attached to any kind of an intake connecphysiological as in the diagnosis of certain tion, as for example, a rubber hose leading diseases or whether this becornplicated by from a respiration apparatus.

- use in connection with psychological tests in The elbow 5 is adjustably held within the 30 which the effects of mental activity are flange 3 and against the washer 4 by a stem studied through such metabolism. In these 6 on the outer end of which is threaded an tests as indicated above, it has been found adjusting nut 7 contacting with a bearing 5 necessary to circulate the gas in such a way formed on the curve of the elbow so as to be that the patient will be undisturbed or disaligned with the central axis of the contacttracted and be relieved of respiratory labor ing arm.- The stem 6 is held in a cross piece and the gas will be handled without the or spider .Sleft across the intake opening 3 slightest possible contamination, especially being threaded therein and held by alock from any source involving carbon. nut 9 so as to be adjustable therethrough.

40 The construction of such apparatus. is The stem extends through this ridge or therefore highly specialized but neverthespider in alignment with the fan shaft 10 less is capable of otheruses whether ofthe and is adapted to be adjustably brought into same degree of exacting requirement or of a contact with the end of said shaft for adless exacting demand. justment as hereinafter described.

45 As illustrative of my invention I have Opposite the intake opening the side 1 of shown in the accompanying drawing a the casing is provided with an elongated blower apparatus which I have found well bearing 11 extending well within the casing adapted to use and which I will now pro and having an outsideportion 11 in Whlcl ceedto describe in connection with the acany suitable oiling device as 12 is mounted.

companying drawings. Throughout the :ihisoiling device connects with astufiing loo and two side box 18 of any suitable type surrounding the shaft 10.

The fan shaft 10 is connected by any suitable coupling lt providing slight play or adjustment ot the shaft 10 relative to the motor shalt 15 of the motor M. On the bearing 11 a cup shaped hub 16 the outer end ot' which is threaded to the shaft 10 and held by the lock nut 17 so that the hub 16 is fast. on the shaft 10 by which it is driven.

At its inner end the hub 16 is provided with an outturned tlange to which is fastened the tan member 18. This member may be variously formed but is preferably of channel shape, comprising a rear wall *alls. Its front side may also be closed forming a more or less complete tube opened adjacent its center and opposite the intake, or the tan may be termed entirely open on its front side. This lt'an member in such a device is very light, preferably being made of thin aluminum stock and as a result 0t lts importance as a check to the oil which tends to be drawn through the bearing 11 by the suction of the :fan. Should any such oil or residue thereof be actually drawn into the blower, the accuracy of the test might and probably would be lost. It is, there tore, import ant to withhold this oil while allowin its full lubricativc action for the :tull 101 7 h at the bearing. This packing 19 is held under slight coinpressimi by the end of the stem 6 which bears upon the end of. the shaft 10, thus :torcii'lg the inner face of the hub 16 against the packing, making an oil and air tight. joint. Any oil reaching this parking either checked by it or it drawn under or around the shaft it is caught up by the powerful capillary action of this librous material and thus held during the test or er-zperiincnt. These packiugs can be frequently replaced in order to maintain their elliciency.

The motor M is provided with a pair of feet- 20 and the blower with a single foot 21 thus giving a three point suspension form of support to the apparatus. About these feet I slip tulnilai. shoes S of rubber or like material. This not only altords a cushioning support but permits a slight adjustment of the motor and blower on any mounting on which they are held by the bolts 22.

The motor is preferably rigidly coupled to the blower casing as at 2% by tie rods so as to hold the parts aligned and prevent vibration.

As above explained, my construction is of great advantage in connection with metabolism apparatus or the like, and I have, therefore, shown in Fig. 5 a somewhat diag'annnatic view indic'ating its location and connection with such apparatus. In such apparatus I have indicated the n'iotor and blower by their characters assigned above. The soda lime tank I have indicated at T with the connection o3 between the exhaust 2 ot the blower and the intake of the apparatus. This is simply a short piece of pipe or hose connecting these nipples and 23. The connection 25 passes from the outlet of the tank to the respiratory apparatus It oil whatever i'orm is to be used. The return 36 leads from the mouthpiece R back to the intake ol the blower 1.

lVith such an installation as this, it will be seen that the blower is called upon for a most exacting peritorn'iance. Not only nmst the (mygen which is being supplied to the patient be conserved, but it must be preserved against dilution by leakage of air. Further, as above described, it must not be contaminated as the scientific results of the test would be rendered utterly unreliable.

This is one of the vital features 0t my invention and is one of the reasons for my conception of the elongated bearing 11 and the packing under the hub. There is, of course, with all blowers, a tendency to draw in ai about the main hearing, but in the ordinary blower such leakage does no harm at all. My elongated bearing is, theretm'e, of very great importance as a check on such leakage, especially in its coi'nbinatiou with the absorbent compressible washer 19 which not only checks any leakage of air or indrawing ot oil, but anticipates the same by reason of its location, which is so tar advanced as to be almost in the intake ot the blower. l urtllcrmore, the long bearing makes the blower very steady, and in bear-- lation to the light hollow fan. blades permits a speed oi." t'roin loan to th) 1.5M. without craiting any disturbing vibration.

The motor blower unit can be set up on an ordinary table or stand with the rest. of the apparatus right at the bedside ot the patient and can be quickly l'GlllOVQtl and passed on to other patients or stored, as may be desired.

lVhile I have described my above struc ture in some detail as to its various points ot desirable improvement, it will be nucleistood that these elements may be variously 1. In a blower of the class described, a-

casing, an elongated bearing extending within sa1dcas1ng,a shaft through sald bearlng,

a cap shaped fan hub mounted on said bearing and attached to said shaft, a compress ble member disposed between. the end of said bearing and said fan hub and disposed aboutsaid shaft, and means for adjusting said hub against said member.

2. In a blower of the class described, a casing, an elongated bearing extending withinv said casing, a shaft through said bearing, a fan hub mounted on said bearing and attached to said shaft, a compressible packing member disposed between the end of said bearing and said hub and about said shaft, and means for adjusting said hub against said member.

3. A blowerof theclass described, com prising a casing, an intake opening centrally of said casing, an intake elbow rotatably disposed over said opening, an adjusting stem disposed through said elbow axially of its arm, and an adjustable clamping member threaded on said stem for'holding said elbow arm'against said casing, and a fan shaft rotatably mounted in said casing, a hub on said shaft, and a packing behind said hub said stem being aligned with said shaft and in adjusting contact therewith.

4:. In a fan of the class described, a casing having an intake, a blade member rotatably mounted in said casing, said member comprising back and side walls defining a channel longitudinally of the blade, and having an open side disposedtowards said intake. I

6. In a fan of the classdescribed, .a casing having an intake, a blade member ro tatable therein, said member having an arm channel longitudinally of the blade, and having an open side disposed towards said intake.

6. In a fan of the class described, a casing having an intake, a hub and a blade 'member' attached to said hub, said member comprising a shaft rotatably mounted in said casing, an integral sheet metal back and side walls bent to define a channel longitudinally of the blade, and having an open side disposed towards said intake.

WARREN E. COLLINS. 

